US8451417B2 - Color filter display panel and flat panel display including the same - Google Patents
Color filter display panel and flat panel display including the same Download PDFInfo
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- US8451417B2 US8451417B2 US13/035,775 US201113035775A US8451417B2 US 8451417 B2 US8451417 B2 US 8451417B2 US 201113035775 A US201113035775 A US 201113035775A US 8451417 B2 US8451417 B2 US 8451417B2
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- column spacer
- color filter
- display plate
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
- G02F1/133519—Overcoatings
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2003/1034—Materials or components characterised by specific properties
- C09K2003/1062—UV-curable materials
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13396—Spacers having different sizes
Definitions
- the described technology relates generally to a color filter display plate and a flat panel display device including the same.
- LCDs liquid crystal displays
- OLED organic light emitting diode
- EPD electrophoretic display
- LCDs liquid crystal displays
- An LCD includes two substrates with electrodes formed thereon and a liquid crystal layer interposed between the two substrates. In LCDs, a voltage is applied to the electrodes to realign liquid crystal molecules of the liquid crystal layer to thereby regulate the transmittance of light passing through the liquid crystal layer.
- Upper and lower substrates of the LCD are coupled by a sealant formed at the peripheral edge to seal the liquid crystal molecules, and are supported by a plurality of column spacers forming a constant pattern between the upper and lower substrates to maintain a cell gap (e.g., a predetermined cell gap).
- a cell gap e.g., a predetermined cell gap
- liquid crystal may not be fully inserted between the upper and lower substrates when the liquid crystal lacks (e.g., when the amount of liquid crystal in the liquid crystal layer is insufficient), thereby causing void or cold bubble. Furthermore, the cell gap may not be constantly maintained when the amount of the liquid crystal is excessive, thereby decreasing a liquid crystal margin.
- a color filter display plate may include a substrate, a light blocking member on the substrate, a color filter on the substrate, a covering layer covering the light blocking member and the color filter, a common electrode on the covering layer, a plurality of support members on the common electrode at locations corresponding to the light blocking member, and a main column spacer, a middle column spacer, and an auxiliary column spacer, each of which is on a corresponding one of the support members, the column spacers having different heights and area ratios.
- the height of the middle column spacer may be less than that of the main column spacer and greater than that of the auxiliary column spacer.
- Each of the area ratios may be calculated by multiplying an area of a horizontal cross-section of a corresponding one of the main column spacer, the middle column spacer, or the auxiliary column spacer with a number of the respective column spacer per unit area.
- the support members may include a photo-curable organic or metal layer.
- the middle column spacer may include a plurality of sub-middle column spacers, each having a different height or area ratio.
- the main column spacer may include a plurality of sub-main column spacers, each having a different height or area ratio.
- the auxiliary column spacer may include a plurality of sub-auxiliary column spacers, each having a different height or area ratio.
- a color filter display plate may include a substrate including a reflecting portion and a transmitting portion, a light blocking member on the substrate, a color filter on the substrate and covering a part of the light blocking member, a covering layer covering the light blocking member and the color filter, a common electrode on the covering layer, a cell gap control layer on the common electrode in the reflecting portion, a plurality of support members on the common electrode in the transmitting portion of the substrate at locations corresponding to the light blocking member, and a main column spacer, a middle column spacer, and an auxiliary column spacer on the cell gap control layer and a corresponding one of the support members, the column spacers having different heights.
- the cell gap control layer may include the same material as that of the support members.
- the height of the middle column spacer may be less than that of the main column spacer and greater than that of the auxiliary column spacer.
- An area ratio may be calculated by multiplying an area of a horizontal cross-section of a corresponding one of the main column spacer, the middle column spacer, or the auxiliary column spacer with a number of the respective column spacer per unit area, the main column spacer, the middle column spacer, and the auxiliary column spacer having different area ratios.
- the support members may include a photo-curable organic or metal layer.
- a flat panel display may include a color filter display plate, and a thin film transistor display plate facing the color filter display plate and including a lower substrate, a gate line on the lower substrate, a data line crossing the gate line in an insulated manner, a thin film transistor coupled with the gate line and the data line, a pixel electrode coupled with the thin film transistor, a plurality of support members, each of which is at a location corresponding to one of the gate line, the data line, or the thin film transistor, and a main column spacer, a middle column spacer, and an auxiliary column spacer on the support members and having different heights.
- the flat panel display may further include a passivation layer covering the thin film transistor, wherein the support members are on the passivation layer.
- the height of the middle column spacer may be less than that of the main column spacer and greater than that of the auxiliary column spacer.
- An area ratio may be calculated by multiplying an area of a horizontal cross-section of a corresponding one of the main column spacer, the middle column spacer, or the auxiliary column spacer with a number of the respective column spacer per unit area, the main column spacer, the middle column spacer, and the auxiliary column spacer having different area ratios.
- a flat panel display may include a color filter display plate, and a thin film transistor display plate facing the color filter display plate and including a lower substrate including a reflecting portion and a transmitting portion, a gate line on the lower substrate, a data line crossing the gate line in an insulated manner, a thin film transistor coupled with the gate line and the data line, a pixel electrode coupled with the thin film transistor, a reflective electrode on a pixel electrode of the reflecting portion, a cell gap control layer on the reflective electrode, a plurality of support members, each of which is at a location corresponding to one of the gate line, the data line, or the thin film transistor in the transmitting portion, and a main column spacer, a middle column spacer, and an auxiliary column spacer on the cell gap control layer and on the support members and having different heights.
- the flat panel display may further include a passivation layer covering the thin film transistor, wherein the support members are on the passivation layer.
- the cell gap control layer may include the same material as that of the support members.
- the height of the middle column spacer may be less than that of the main column spacer and greater than that of the auxiliary column spacer.
- An area ratio may be calculated by multiplying an area of a horizontal cross-section of a corresponding one of the main column spacer, the middle column spacer, or the auxiliary column spacer with a number of the respective column spacer per unit area, the main column spacer, the middle column spacer, and the auxiliary column spacer having different area ratios.
- pooling and smearing can be prevented or reduced by forming the main column spacer, the middle column spacer, and the auxiliary column spacer, each having a different height and a different area ratio, and the liquid crystal margin can also be increased.
- the support members are formed under the main column spacer, the middle column spacer, and the auxiliary column spacer to prevent or reduce pooling and smearing when a pressure is applied.
- FIG. 1 is a layout view of a color filter display plate according to a first exemplary embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the color filter display plate of the first exemplary embodiment shown in FIG. 1 .
- FIG. 3 shows a method for manufacturing the color filter display plate according to the first exemplary embodiment using an optical mask.
- FIG. 4 is a layout view of a color filter display plate according to a second exemplary embodiment of the present invention.
- FIG. 5 is a layout view of a color filter display plate according to a third exemplary embodiment of the present invention.
- FIG. 6 is a layout view of a color filter display plate according to a fourth exemplary embodiment of the present invention.
- FIG. 7 is a cross-sectional view of a color filter display plate according to a fifth exemplary embodiment of the present invention.
- FIG. 8 is a cross-sectional view of an LCD according to a sixth exemplary embodiment of the present invention.
- FIG. 9 is a cross-sectional view of an LCD according to a seventh exemplary embodiment of the present invention.
- a main column spacer and an auxiliary column spacer may be formed with different heights to increase the liquid crystal margin and to thereby decrease void or cold bubble.
- a color filter display plate 200 according to a first exemplary embodiment of the present invention will be described in further detail.
- FIG. 1 is a layout view of a color filter display plate 200 according to a first exemplary embodiment
- FIG. 2 is a cross-sectional view of the color filter display plate 200 of the first exemplary embodiment shown in FIG. 1 .
- a light blocking member 220 is formed on a transparent upper substrate 210 such as glass.
- the light blocking member 220 may be formed with metal, such as chromium, or an organic material.
- the light blocking member 220 includes a matrix-type light blocking member 221 having a plurality of opening areas 220 a exposing the upper substrate 210 , and an ohmic-type light blocking member 222 formed in the opening area 220 a of the matrix-type light blocking member 221 .
- One opening area 220 a of the matrix-type light blocking member 221 corresponds to one pixel, and the opening area 220 a of the matrix-type light blocking member 221 has a rectangular shape, and the matrix-type light blocking member 221 protrudes from the lower-left portion of the opening area 220 a .
- the ohmic light blocking member 222 may have various cross-sectional shapes such as a circle, a quadrangle, a hexagon, an oval, and a polygon, such as the ohmic light blocking member 222 according to the first exemplary embodiment, which has an octagonal shape.
- a plurality of color filters 230 are formed on the upper substrate 210 and the light blocking member 220 , and the color filters 230 are arranged to be fit into the opening area 220 a defined by the light blocking member 220 .
- Each color filter 230 may represent one of the primary colors of red, green, and blue.
- a covering layer 240 of an organic material is formed on the color filter 230 . The covering layer 240 protects the color filter 230 from an etching solution of a common electrode 270 .
- the common electrode 270 which receives a common voltage and is formed with a transparent conductive material, such as ITO or IZO, is formed on the color filter 230 .
- a support member 340 which may include a plurality of separate portions or a plurality of separate support members, is formed at a place or places on the common electrode 270 corresponding to the light blocking member 220 .
- the support member 340 includes a first support member 341 formed on the matrix-type light blocking member 221 , and a second support member 342 formed on the ohmic light blocking member 222 .
- the support member 340 may have various shapes, such as a circle, a quadrangle, a hexagon, an oval, and a polygon, and may be formed with a photo-curable organic or metal layer.
- the support member 340 supports a column spacer 350 , which may include a plurality of separate portions, to thereby prevent or reduce pooling or smearing that may occur when a pressure is applied.
- the column spacers 350 may include a main column spacer 351 , a middle column spacer 352 , and an auxiliary column spacer 353 , each having a different height and being formed on the support member 340 .
- a height d 1 of the main column spacer 351 is the greatest and a height d 3 of the auxiliary column spacer 353 is the least, and heights d 2 a and d 2 b of the middle column spacer 352 are less than the height d 1 of the main column spacer 351 and greater than the height d 3 of the auxiliary column spacer 353 .
- the main column spacer 351 , the middle column spacer 352 , and the auxiliary column spacer 353 may respectively include a plurality of sub-main column spacers, a plurality of sub-middle column spacers (e.g., 352 a and 352 b ), and a plurality of sub-auxiliary column spacers, each having a different height.
- a first sub-middle column spacer 352 a has a height greater than that of a second sub-middle column spacer 352 b.
- the column spacer 350 may be formed using a photo mask 1000 (see FIG. 3 ) formed by stacking layers having different transmittances.
- FIG. 3 shows a method for manufacturing the color filter display plate 200 using the photo mask according to the first exemplary embodiment.
- the photo mask 1000 includes a first area A 1 where a transmittance is about 100%, a second area A 2 where the transmittance is about 70%, a third area A 3 where the transmittance is about 50%, and a fourth area A 4 where the transmittance is less than about 30%.
- Three thin films 1100 , 1200 and 1300 are formed in the fourth area A 4 of the photo mask 1000 , two thin films 1100 and 1200 are stacked in the third area A 3 of the photo mask 1000 , and the thin film 1100 is stacked in the second area A 2 .
- the main column spacer 351 corresponds to the first area A 1 having a transmittance of about 100% of the photo mask 1000
- the first sub-middle column spacer 352 a corresponds to the second area A 2 having a transmittance of about 70% of the photo mask 1000
- the second sub-middle column spacer 352 b corresponds to the third area A 3 having a transmittance of about 50% of the photo mask 1000
- the auxiliary column spacer 353 corresponds to the fourth area A 4 having a transmittance of less than about 30% of the photo mask 1000 .
- the auxiliary column spacer 353 Since the height of the auxiliary column spacer 353 is less than that of the main column spacer 351 and the middle column spacer 352 , it can guarantee (or reasonably guarantee) a space for movement of liquid crystal. Thus, the auxiliary column spacer 353 improves the liquid crystal margin to prevent or reduce void or cold bubble.
- the height of the middle column spacer 352 is less than that of the main column spacer 351 and greater than that of the auxiliary column spacer 353 , void or cold bubble that may otherwise occur when only the main column spacer 351 is used can be prevented or reduced, and pooling or smearing that may otherwise occur when only the main column spacer 351 and the auxiliary column spacer 353 are used can be prevented or reduced.
- Horizontal cross-sections of the main column spacer 351 , middle column spacer 352 , and auxiliary column spacer 353 may have various shapes including, for example, a circle, a quadrangle, a hexagon, an oval, and a polygon.
- main column spacer 351 , the middle column spacer 352 , and the auxiliary column spacer 353 may be different from each other in a ratio of areas (e.g., area ratios) SR.
- S is an area of a horizontal cross-section of the column spacer 350 and E is the number of column spacers 350 per unit area.
- E is the number of column spacers 350 per unit area.
- the area ratio of the main column spacer 351 may be between about 0.1% to about 0.3%. When the area ratio of the main column spacer 351 is less than about 0.1%, pooling or smearing may easily occur, and when the area ratio of the main column spacer 351 is greater than about 0.3%, the liquid crystal margin is decreased so that void or cold bubble may be more easily generated. In this case, the height of the main column spacer 351 may be between about 2.3 ⁇ m to about 2.4 ⁇ m.
- the area ratio of the middle column spacer 352 may be about 0.2% to about 1.0%. When the area ratio of the middle column spacer 352 is less than about 0.2%, pooling or smearing may easily occur, and when the area ratio of the middle column spacer 352 is greater than about 1.0%, the liquid crystal margin is decreased so that void or cold bubble may be easily generated. In this case, the height of the middle column spacer 352 may be less than that of the main column spacer 351 , and between about 1.9 ⁇ m to about 2.2 ⁇ m.
- the area ratio of the first sub-middle column spacer 352 a may be about 0.2% to about 0.5%
- the height of the first sub-middle column spacer 352 a may be about 2.1 ⁇ m to about 2.2 ⁇ m
- the area ratio of the second sub-middle column spacer 352 b may be about 0.5% to about 1.0%
- the height of the second sub-middle column spacer 352 b may be about 1.9 ⁇ m to about 2.0 ⁇ m.
- the area ratio of the auxiliary column spacer 353 may be about 1.0% to about 2.0%.
- the area ratio of the auxiliary column spacer 353 is less than about 1.0%, the area ratios of the main column spacer 351 and the middle column spacer 352 are increased so that the liquid crystal margin is decreased, thereby causing void or cold bubble.
- the area ratio of the auxiliary column spacer 353 is greater than about 2.0%, the area ratios of the main column spacer 351 and the middle column spacer 352 are relatively decreased, and therefore pooling and smearing may occur more easily.
- the main column spacer 351 , the middle column spacer 352 , and the auxiliary column spacer 353 have different heights and area ratios to prevent or reduce pooling and smearing while also increasing the liquid crystal margin.
- the pattern of the light blocking member 220 of the color filter display plate 200 according to the first exemplary embodiment may be variously modified.
- various modifications will be described with several exemplary embodiments in further detail.
- FIG. 4 is a layout view of a color filter display plate 200 according to a second exemplary embodiment of the present invention.
- the second exemplary embodiment is substantially the same as the first exemplary embodiment shown in FIG. 1 and FIG. 2 , with an exception being that the shape of a matrix-type light blocking member 221 is different from that of the first exemplary embodiment, and therefore description of the same elements of the first exemplary embodiment will be omitted.
- a light blocking member 220 includes a matrix-type light blocking member 221 having a plurality of opening areas 220 a that expose an upper substrate 210 (see FIG. 2 and FIG. 3 ) and an ohmic light blocking member 222 formed in each of the opening areas 220 a of the matrix-type light blocking member 221 .
- the opening area 220 a of the matrix-type light blocking member 221 has a rectangular shape, and the matrix-type light blocking member 221 protrudes from an upper-left portion of the opening area 220 a .
- the ohmic light blocking member 222 may have various shapes such as a circle, a quadrangle, a hexagon, an oval, and a polygon, such as the ohmic light blocking member 222 in the second exemplary embodiment, which has an octagonal shape.
- FIG. 5 is a layout view of a color filter display plate 200 according to a third exemplary embodiment of the present invention.
- the third exemplary embodiment is substantially the same as the second exemplary embodiment shown in FIG. 4 , with the exception of the shape of an ohmic light blocking member 222 and the shape of a second support member 342 , and therefore description of the same elements as in the first exemplary embodiment will be omitted.
- a light blocking member 220 includes a matrix-type light blocking member 221 having a plurality of opening areas 220 a that expose an upper substrate 210 (see FIG. 2 and FIG. 3 ), and an ohmic light blocking member 222 formed in each of the opening areas 220 a of the matrix-type light blocking member 221 .
- the opening area 220 a of the matrix-type light blocking member 221 has a rectangular shape, and the matrix-type light blocking member 221 protrudes from an upper-left portion of the opening area 220 a .
- the ohmic light blocking member 222 has a rectangular shape erected (e.g., oriented) in a length direction.
- a plurality of color filters 230 are formed on the upper substrate 210 and the light blocking member 220 , a covering layer 240 (see FIG. 2 and FIG. 3 ) formed with an organic material and the like is formed on the color filters 230 , and a common electrode 270 (see FIG. 2 and FIG. 3 ) is formed on the covering layer 240 .
- a support member 340 is formed at a location above the common electrode 270 and corresponding to the light blocking member 220 .
- the support member 340 includes a first support member 341 formed on the matrix-type light blocking member 221 and a second support member 342 formed on the ohmic light blocking member 222 .
- the second support member 342 has a rectangular shape.
- a main column spacer 351 , a middle column spacer 352 , and an auxiliary column spacer 353 are formed on the support member 340 , and a column spacer 350 formed on the second support member 342 may have a different shape than that of a column spacer 350 formed on the first support member 341 .
- a horizontal cross-section of the column spacer 350 (e.g., column spacers 351 , 352 a , 352 b , and 353 , individually) formed on the second support member 342 has an oval shape.
- FIG. 6 is a layout view of a color filter display plate 200 according to a fourth exemplary embodiment of the present invention.
- the fourth exemplary embodiment is substantially the same as the first exemplary embodiment of the present invention shown in FIG. 1 and FIG. 2 , except for the shape of the ohmic light blocking member and the shape of a second support member, and therefore, description of the same elements as in the first exemplary embodiment will be omitted.
- a light blocking member 220 includes a matrix-type light blocking member 221 having a plurality of opening areas 220 a that expose an upper substrate 210 (see FIG. 2 and FIG. 3 ) and an ohmic light blocking member 222 formed in each of the opening areas 220 a of the matrix-type light blocking member 221 .
- the opening area 220 a of the matrix-type light blocking member 221 has a rectangular shape
- the ohmic light blocking member 222 has a rectangular shape crossing the opening area 220 a of the matrix-type light blocking member 221 .
- a plurality of color filters 230 are formed on the upper substrate 210 and the light blocking member 220 , a covering layer 240 (see FIG. 2 and FIG.
- a support member 340 is formed at a location above the common electrode 270 and corresponding to the light blocking member 220 .
- the support member 340 has a rectangular shape and is formed on the ohmic light blocking member 222 .
- a main column spacer 351 , a middle column spacer 352 , and an auxiliary column spacer 353 are formed on the support member 340 , and a column spacer 350 formed on the support member 340 (which may be a second support member 342 ) has a rectangular horizontal cross-section.
- an additional support member is formed under the column spacer 350 of the color filter display plate 200 of the transmissive LCD.
- a column spacer 350 is formed on a cell gap control layer 380 (see FIG. 7 ) of a reflecting portion in a color filter display plate 200 and a support member 340 is formed with the same material as that of the cell gap control layer 380 in a transmitting portion to thereby prevent or reduce pooling and smearing.
- FIG. 7 is a cross-sectional view of a color filter display plate 200 according to a fifth exemplary embodiment of the present invention.
- a color filter display plate 200 of a transflective LCD includes a transmitting portion T, through which light from a backlight device is passed, and a reflecting portion R that reflects incident light incident from an external side.
- a layered structure that is the same as that of the color filter display plate 200 according to the first exemplary embodiment shown in FIG. 1 and FIG. 2 is formed in the transmitting portion T. That is, a support member 340 is formed at a location above a common electrode 270 and corresponding to the light blocking member 220 , and the support member 340 may be formed with a photo-curable organic layer. The support member 340 supports the column spacer 350 so that pooling or smearing that may occur due to pressure can be prevented or reduced.
- a main column spacer 351 , a middle column spacer 352 , and an auxiliary column spacer 353 , respectively having different heights d 1 , d 2 , and d 3 and different area ratios, are formed on the support member 340 so that pooling or smearing can be prevented or reduced while a liquid crystal margin can be improved.
- a cell gap control layer 380 is formed on the common electrode 270 in the reflecting portion R.
- the cell gap control layer 380 may be formed with the same material as that of the support member 340 .
- the cell gap control layer 380 controls (e.g., causes) a cell gap of the reflecting portion R to be smaller than that of the transmitting portion T, so as to make a phase delay of light in the reflecting portion R almost equivalent to that in the transmitting portion T.
- color reproducibility can be uniform, or substantially uniform, in the reflecting portion R and the transmitting portion T so that a display characteristic of the LCD can be improved.
- a main column spacer 351 , a middle column spacer 352 , and an auxiliary column spacer 353 , respectively having different heights and different area ratios, are formed on the cell gap control layer 380 , and the cell gap control layer 380 supports the main column spacer 351 , the middle column spacer 352 , and the auxiliary column spacer 353 , so that pooling or smearing that may occur due to pressure can be prevented or reduced.
- the main column spacer 351 , the middle column spacer 352 , and the auxiliary column spacer 353 which are different in height and in area ratio, are formed in the color filter display plate 200 of the LCD.
- they may be formed in a thin film transistor display plate 100 (see FIG. 8 ) of the LCD.
- FIG. 8 is a cross-sectional view of an LCD according to a sixth exemplary embodiment of the present invention.
- a thin film transistor display plate 100 includes a lower substrate 110 formed with transparent glass or plastic, and also includes a gate line and a gate electrode 124 formed on the lower substrate 110 .
- a gate insulating layer 140 is formed with, for example, a silicon nitride (SiNx) or silicon oxide (SiOx).
- a semiconductor layer 150 including amorphous silicon (a-Si) is formed on the gate insulating layer 140 .
- the semiconductor layer 150 overlaps the gate electrode 124 .
- Ohmic contacts 163 and 165 are formed on the semiconductor layer 150 .
- the ohmic contacts 163 and 165 may be formed with silicide, or with n+ hydrogenated amorphous silicon in which n-type impurities are doped at a high concentration.
- a data line and a drain electrode 175 are formed on the ohmic contacts 163 and 165 and the gate insulating layer 140 .
- the data line transmits a data signal, and extends in the vertical direction such that it crosses the gate line.
- the data line includes a source electrode 173 extended toward the gate electrode 124 .
- the drain electrode 175 faces the source electrode 173 , with the gate electrode 124 therebetween.
- One gate electrode 124 , one source electrode 173 , and one drain electrode 175 form one thin film transistor (TFT) together with the semiconductor layer 150 , and a channel of the thin film transistor is formed in the semiconductor layer 150 between the source electrode 173 and the drain electrode 175 .
- a passivation layer 180 is formed on the data line, the drain electrode 175 , and an exposed portion of the semiconductor layer 150 .
- the passivation layer 180 may be formed with an inorganic insulator such as silicon nitride and silicon oxide, an organic insulator, or a low electric constant insulator.
- a contact hole 182 that exposes the drain electrode 175 is formed in the passivation layer 180 , and a pixel electrode 191 is formed on the passivation layer 180 .
- the pixel electrode 191 may be formed with a transparent conductive material such as ITO and IZO, or with a reflective material such as aluminum, silver, and alloys thereof.
- a support member 340 is formed at a location on the passivation layer 180 corresponding to the gate line, the data line, or the thin film transistor.
- the support member 340 is formed of a photo-curable organic layer or a metal layer and supports the column spacer 350 , and therefore pooling or smearing that may occur due to pressure can be prevented or reduced.
- a main column spacer 351 , a middle column spacer 352 , and an auxiliary column spacer 353 are formed on the support member 340 .
- a color filter display plate 200 is formed facing the thin film transistor display plate 100 and on the thin film transistor display plate 100 , and a gap between the color filter display plate 200 and the thin film transistor display plate 100 is maintained by the column spacer 350 .
- a liquid crystal layer is formed between the color filter display plate 200 and the thin film transistor display plate 100 .
- the liquid crystal margin can also be improved by forming the main column spacer 351 , the middle column spacer 352 , and the auxiliary column spacer 353 with different heights and area ratios.
- an additional support member may be formed under the column spacer (e.g., 351 , 352 , or 353 ) in the thin film transistor of the transflective LCD.
- the column spacer e.g., 351 , 352 , or 353
- the support member 340 is formed with the same material as that of the cell gap control layer 380 in the transmitting portion T of the thin film transistor display plate 100 of the transflective LCD to prevent or reduce pooling and smearing.
- FIG. 9 is a cross-sectional view of an LCD according to a seventh exemplary embodiment of the present invention.
- a transflective LCD includes a transmitting portion T, through which light from a backlight device is passed, and a reflecting portion R that reflects incident light incident from an external side.
- a layered structure that is the same or substantially the same as that of the color filter display plate 200 according to the fifth exemplary embodiment shown in FIG. 7 is formed in the transmitting portion T. That is, a support member 340 is formed at a location on a passivation layer 180 , corresponding to one of a gate line, a data line, and a thin film transistor.
- the support member 340 may be formed with a photo-curable organic layer.
- the support member 340 supports the column spacer 350 so that pooling or smearing that may occur due to pressure can be prevented or reduced.
- a main column spacer 351 , a middle column spacer 352 , and an auxiliary column spacer 353 , having different respective heights and different respective area ratios, are formed on the support member 340 so that pooling and smearing can be prevented or reduced and so that a liquid crystal margin can also be improved.
- a reflective layer 195 is formed on a pixel electrode 191
- a cell gap control layer 380 is formed on the passivation layer 180 .
- the cell gap control layer 380 may be formed with the same material as that of the support member 340 .
- the cell gap control layer 380 controls (e.g., causes) a cell gap of the reflecting portion R to be smaller than that of the transmitting portion T such that light phase delay of the reflecting portion R becomes almost equivalent to that of the transmitting portion T.
- the reflecting portion R and the transmitting portion T express uniform, or substantially uniform, color reproducibility so that display characteristics of the LCD can be improved.
- the main column spacer 351 , the middle column spacer 352 , and the auxiliary column spacer 353 , having different respective heights and area ratios, are formed on the cell gap control layer 380 , and the cell gap control layer 380 supports the main column spacer 351 , the middle column spacer 352 , and auxiliary column spacer 353 , and accordingly, pooling and smearing that may occur due to pressure can be prevented or reduced.
- Reference Characters 220 light blocking member 230: color filter 340: support member 350: column spacer 351: main column spacer 352: middle column spacer 380: cell gap control layer
Abstract
Description
SR(%)=S(μm2)*E(ea/cm2)/106 [Equation 1]
Description of Some |
of the Reference Characters |
220: | light blocking member |
230: | color filter |
340: | support member |
350: | column spacer |
351: | main column spacer |
352: | middle column spacer |
380: | cell gap control layer |
Claims (21)
Applications Claiming Priority (2)
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KR10-2010-0053461 | 2010-06-07 | ||
KR1020100053461A KR20110133836A (en) | 2010-06-07 | 2010-06-07 | Color filter display panel and plat panel display including the same |
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US20110299002A1 US20110299002A1 (en) | 2011-12-08 |
US8451417B2 true US8451417B2 (en) | 2013-05-28 |
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US13/035,775 Active 2031-11-02 US8451417B2 (en) | 2010-06-07 | 2011-02-25 | Color filter display panel and flat panel display including the same |
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KR (1) | KR20110133836A (en) |
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US20110299002A1 (en) | 2011-12-08 |
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